Hacksaw-machine.



BAS. BRADFORD, JR. @L M. OLSON. 'HACKSAW MACHINE.

APPLICATION FILED 00T. 13, 1908.

BY J

' A TTOR/VEX '-WITMES'SES l W E. S. BRADFORD, JE. d; M. LSONl HAGKSAW MACHINE,

APPLICATION FILED o01.1s,19os.

LVI/ENTORS,

3 SHEETS-SHEET 2.

atenteo Dec. 21, 1909.

ATTORNEY.

E. S., BRADFORD, JR. 6L M. OLSON.

HAGKSAW MACHINE.

APPLICATION FILED 001113.19021.

[.VVENo/es x A TTORNEY,

3 T E E H S S T E E H S a Patented. Dec. 21,

WTNESSES:

iii i.

15 `Contact reducing the amount e i' invention is to To ati 'lofi/.e

.i i .2e esaennsems,

rovenients in ineen during; Lie re- 1 will he out of. l

provide i r i ding; the work in e, ,suitable a i; during the sz'mine operetion and so that the n'oil' or piece heing seared. is alweye eenered with relation to 1 the Stroke.

to provide .means "for quieliy veel, Sziwtiade ai i, ii" n. ject te provide eiuteh n the ini-chine into .and out 'ther oloer hrowing uktion,

ion will ep- Y peer and the ept forming' a part eetioin-i ignre i e side ele- .iiiled inaehine. Fig. 2 i" the same. Fig. S3 is e vertical View on the iin; -3 ot Fi; i. looking in the direction oi? the arrow and Clearly showing the ineens :tor Varying the length of stroke. if is a vertical seo.' tional View on the line of Fig. 2 looking in the direction oi t-..e .fu-row, und clearly illustrating the meei f' ,ing the saw traine on the return Lelfe. is a vertieul eeetional View on i' e e. 5 5 et Fig. l showing the eoiistruetion o1 the gripping` G is detail seetionai View on l, ele-arly showing the tasten Varying the ien` th. ot the seetion'il in de U .ti

eeato'n of Letters Patent.

LELE?, MASSACHUSETTS, AND MAURITZ OLSON, SiS-N035 TO MASSACHUSETTS SAW WORKS, OF r .SLN .ASSCIATlOI-T F MASSACHUSETTS.

ntf-ioitsewuneonnn.

'zstented Der. 2l, 1905i.

Serial No. 457,470.

on said shaft thehnh ot which is provided with interlocking teeth for engaging the teeth on e sleeve e on the shaft c as shown at j' in Fig. E3.

f designates :i disk-Shaped inem'her that is e: rried hy the shaft o and is seenred to the saine hy means oil a setfserew a.

Il, designates a har that is adjustahly set enred to the disk-shaped member g by means of the screws t', and washers i', so that by tightening' and loosenine' these Screws the har /i. may he moved trans-ve Vely of the shaft n, thus varying its operative end from the :axis ot the shaft. The outer end of this har earries :i pin j on whieh is mounted a rectangular hloclr .7e clearly Shown in Fig'. 3. This hloelr is mounted and is adapted for reeipro eetion in the groove m of the link n, which lint-z is pivotally connected at itslower end at. the point. o, to the hriielet g) on one leg the machine as clearly shown in Fig. l. To the upper end of the link frz. is attached link y which is pivotally eonnectedito the saw holding` trame 'r at the point s. This trame reeiproeates on the arin 5' that is boltL ed to a seetorehziped member u which is provided with a curved or arevshaped rim 'v vat right angles to the face portion thereof.

The member u is mounted on a shaft w as shown in Fig. 5. The upper portion of the sector-shaped member is provided With a lng or upward extension and mounted in this extension is a rod 1/ that carries n weight Z so that the saw holding frame fr may have imparted thereto dilterent pressures. A wing' nut is employed for adjustably se.- enring' thel saine to the rod y.

ri`he saw-blade is designated at 2 and the usuel clampingl means for retaining the saine in the trame are employed.

From this construction it will be seen that when the shaft c is rotated the bar h, pin j, and the block 1; which is mounted in grooved or recessed link n, will impart a re y gripping member 3 is provided With jews 4 whieh ene-age the opposite sides of the areshaped riin igthese jaws, as indicated in Figs. l and are provided with gripping eorners 5 so that when the roller 6 of the 'the returnstroke of the trame r this cam `hand threads for moving the jaws 10 in operator to. quickly determine the length of e chine and is provided wlth anjuptnrned end "the pulley cl (see Fig.

grip ing member3 is engaged by thecam 'I Whic is carried by the shaft 0 the frame r and arm t will be elevated as shown in Fig. 4.. It will be noticed that the elevated portion oi'the cam 6 extends practically 180o4 and is so adjusted on the shaft c, that, on

will serve to actuatev the gripping member 3 and rotate the'sector-shaped member fu, on the shaft w. The member 3 is, in edect, suspended from the rim v of the member u.

-ln order to limit the amount oi movement of the member 3 a stop pin 8 is provided, and a spring 9 for normally retaining the roller 6 of the member 3 in contact with the cam 6. p

Referring now to the construction of the improved vise for holding the work during the sawing operation, the jaws of which are designated by the numeral `10; the Work is designated by the numeral 11, and is shown in dotted lines.

12 designates a longitudinali arranged screw that '.is provided with rig it and left posite directions toward and away from the Work. The threads of the screw 12 o course engaging corresponding threads 'in the jaw-member 10, which jaw-members are arranged to slide on the bed portion or frame of the machine.

13 designates-a handle pivoted to the screw 12'tor rotating the same, whereby the jaws 10 of the vise will grip the Work in the Well-known manner.

14- designates an extension oi' the bed portion for receivingf the Work.

15 is a gage device for enabling the op` piece to be cut and is simply a rod that extends through the bed ortion of the maas shown at 16, and a set-screw 17, for hold.- ing the same in dilerent adjusted positions. 18 designates a shelf or ledge piece inte gral with thebed or frame portlon of the machine and is provided with an opening 19. v. 2() designates -a block` or stop member llo-v cated in the opening 19 and"1s attached to the bent leverv 21 which is pivoted to the frame at 22. The opposite end of the lever 21 engages the vhub and .ratchet portion of 3),'by means of a pin and groove connectlon 23 'and2/i. The pnl'- pose of this construction is to cause disenl eeaeee l gagernent of 'the drive-'pulley from ratchet e When'the piece is com letel -sawed ott, and in order to operate 'thelbent lever 21 a projection 25 is carried by the saw-frame r (see Fig. 1) movesso as to strike the stop 2O after the saw passes through the work, and rotates the lever 2 1 aboutits ivot`22 whereby the pulley d is disengaged rom the ratchet hub e, thus stoppin the machine,

In order to start the mac ine, a. handle 26 is provided which is attached to the lever 21 thus permitting the operator to swine-the lever about-its pivot and move the pulley d into [engagement with the ratchet e.

elevated position a bar 27, Vis provided which ispivoted to the frame at 28, and has a notch 29 in the upper end thereof for re-4 ceivin the'pin 30 on the arm t, and a pin 31 is' emp oyed for retaining the bar 27 in place' during the operationfof the machine.

What .we claim2 is:-

1. lln combination with the saw-supporting frame, a shaft, a sector-shaped member rotatably supported thereon and provided with an arc-shaped rim, an arm attached to said member v`for supportino said frame, a drive-shaft, a cam carried tiereby, a member operable from the cam and' provided with aws for gripping said rimwhen operate in one 'dlrectiom said member being suspended from the rim, substantially as described. 1 2. in a heck-saw machine, the combination `with the main trame thereof, va'main shaft, a saw frame proper, adjustable connecting means between the saw-frame and vthe 'main shaft for' varying the length of stroke, 'a sector-shapedv member rotatably supported 'on the second shaft and provided withjan arc-shaped r1m, -an arm for supporting the saw-frame and attached to 'sald sector-shaped member, a member with spaced-jaw' elements for gripplin and operable frdm the main s a whereby theframe maybe elevated on the return stroke.

EDWARD S. BRADFORD, Jr.

MAURITZ OLSON. f Witnesses as to Edward S. Bradford, Jr.:

K. l. CLniiroNs, H. W. BowENf f Witnesses as to MauritzOlson FRANK E. BALLARD.

' S. Swanson.

said rim 7G ln order to retain the saw frame' 1'- in an aor shaft supported in said frame, a second" 

